Q: I would like the calendar to print on one page only. What's the best way to do this?

A: Modifications have been made to SunriseSunset.com to improve the site and to ensure
that the site remains available as a free service. The changes have been reviewed and it is believed
that they do not affect the original mission of the site. Some changes, such as adding
the Day Length option, have increased the possibility that the calendar may not print on one page.

Try selecting the largest font size, near the lower right under the calendar,
as it will abbreviate many words, eliminate blank lines and the
moon phase time. We have found that you can choose the moon phase option and one other option, such as
civil twilight. The calendar will then almost fit on one page by default, you will probably need to choose
the landscape print option and adjust the printer margins a little, see the next two paragraphs.

Choose the link 'Printer Version', near the lower right, when you are ready to print your calendar. This will open a new tab
or window with the current calendar without the ads or links on the page.
You may still need to adjust the page orientation or print size in your browser to have it print on one page.

In your browser on the Print Preview..., Page Setup... or Print Options... windows, you can find
the following settings. Try changing the page orientation to Landscape instead of Portrait to get
the calendar to fit the page better. If the month you are printing requires six rows to print all the weeks,
then Portrait may be the better choice. If it still doesn't fit, in the Print Preview window find
the Page Size percent and adjust the number down, some browsers have a 'Shrink to Fit' option to automatically do this.
You can also adjust the top, bottom, left and right margins
to increase the available print area.

Q: How can I get a future or past, sunrise, sunset or moon time?

A: On the following pages you can select a predefined location and then choose a month and a year between 1901 and 2099:

If you cannot find your location, you can
email us
or enter that location on the custom page with latitude, longitude and time zone information.

Q: How can I make a bookmark or save a link to the calendar page that will default to the current month?

A: Click on the center month under the calendar when you have selected your city and are on the calendar page (calendar.asp):

For this example, click on "August 2016." You can now save (drag it to the desktop) or bookmark the address, aka the link or URL, in the top bar of your browser.
To make it choose the current month, edit the URL, find where it has month=8&year=2016, change it to month=-1&year=-1 and
now bookmark it or save it. When you use that link it will default to the current month and year.

There is more info on linking to the calendar.asp page and the URL here.

Q: Why is the rise or set time off by 1 hour?I found a sunrise, sunset or moon time
on another web site, the TV or the newspaper and it is different from the one here by an hour.
What is the difference and which one is correct?

A: It is probably because one of the times is not being adjusted to
daylight saving time (DST) properly. All times shown on this web site are adjusted to
DST using these rules.

If all days of the month are during DST, the calendar will have the phrase
"Daylight Saving/Summer Time is in effect for the entire month" near the bottom.

"DST Begins" or "DST Ends" will be printed with the day if at any point during
the month it transitions to or from daylight saving time.

When DST is not in effect for any day of the month or that location never observes DST, then "Standard/Winter Time for entire month"
will be displayed at the bottom of the calendar.

You do not need to add an hour to any times, unless the time shown is standard time and you know that
the location will be observing daylight saving time then. If this is the case, add one hour to the times.

To verify the settings your calendar is using, select the checkbox "Latitude, longitude and time info" when making your calendar.
If you are already on the calendar, select the "Modify Settings" link at the bottom of the page and check the checkbox there. You can
also view and change the time zone or DST region or any other data on that page.

Q: How accurate are the times on this site?I found a sunrise, sunset or moon time on another web site or
the newspaper and it is different from the one here by a minute or so. Why are they different?

The algorithms used are "generally accurate to within one minute". The times are rounded
either up or down, to a minute. This would explain the difference.

Q: Please explain more about rounding. What errors might show up and why does the site do it?

From an actual email: I'm an 8th grade science teacher and my students use your site to graph the day length.
The students noticed the day length times on the site do not always match the times they calculated.

A: What the students are seeing is a rounding error. The actual calculation for day length
uses the rise and set times in hours, minutes and seconds, but the resulting numbers are rounded
to the nearest minute for display purposes.

For example, suppose (in 24-hour time format), sunset is 16:45:19, subtracting a sunrise time of
7:29:16 results in a day length of 9:16:03.
This would be displayed as:

Sunrise: 7:29amSunset: 4:45pmDay length: 9h 16m

Now let's say the next day's times are: sunset 16:45:32, sunrise 7:29:06. This results in a day length of 9:16:26 and
would be displayed as:

Sunrise: 7:29amSunset: 4:46pmDay length: 9h 16m

The sunset shown is one minute later, but the day length show is the same as the previous day.

Remember that all times on the site are generally accurate to within a minute,
this is because it is practically impossible to calculate to the exact second when sunrise or sunset will occur.
Why is that so? See the Astronomy page.

Q: Has this site been updated
for changes of the rules for daylight saving time in the USA, Canada and any other countries?

A: The elevation is always calculated at sea level. Mountains and
other large landmarks may also affect local times, these are not accounted for
in the times presented on this Web site or the Windows Sunrise Sunset Calculator.

Where, %20 is a space, 87.6298 is longitude (negative for east), 41.8781 is latitude (negative for south),
-6 is the time zone (positive for east of GMT) and the 1 is the DST region number used on this site
(0=none, 1=North America, 2=Europe, 4=Australia, 5=New Zealand, 6=Brazil, 7=Chile, 8=Israel; 10=Egypt, 11=Jordan, 12=Syria, 13=Falkland Islands, 14=Namibia, 15=Azerbaijan, 16=Argentina, 17=Russia, 18=Mexico, 19=Fiji, 20=Iran, 21=Uruguay, 22=Cuba, 23=Turkey; rules at DST info page).

To have the calendar choose the current month and/or year, set either or both
to -1, e.g. &month=-1&year=-1 .
The server is located in the Eastern time zone of the U.S. and
will use that month and year.

A: No, this site creates calendars for one month at a time only. To create additional monthly calendars use the navigation links at the bottom of the calendar. These links allow you to go forward or backward in monthly or yearly increments.

Q: Can I get this data in CSV (comma-separated values) format?

A: This web site does not produce data in
CSV format. Our iPhone/iPad app has an option to provide a CSV file,
see EdwardsApps.com.
Please email us if you have this or any other special request.

Q: I've got a question you didn't cover. Where else can I look?

A: Many other answers to questions can be found at the following sites: